/* Copyright (C) 2014 InfiniDB, Inc.

   This program is free software; you can redistribute it and/or
   modify it under the terms of the GNU General Public License
   as published by the Free Software Foundation; version 2 of
   the License.

   This program is distributed in the hope that it will be useful,
   but WITHOUT ANY WARRANTY; without even the implied warranty of
   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
   GNU General Public License for more details.

   You should have received a copy of the GNU General Public License
   along with this program; if not, write to the Free Software
   Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston,
   MA 02110-1301, USA. */

/***********************************************************************
 *   $Id: simplefilter.cpp 9679 2013-07-11 22:32:03Z zzhu $
 *
 *
 ***********************************************************************/
#include <exception>
#include <stdexcept>
#include <string>
#include <iostream>
#include <sstream>
using namespace std;

#include "returnedcolumn.h"
#include "constantcolumn.h"
#include "simplecolumn.h"
#include "operator.h"
#include "constantfilter.h"
#include "bytestream.h"
#include "objectreader.h"
#include "functioncolumn.h"
#include "arithmeticcolumn.h"
#include "simplefilter.h"
#include "aggregatecolumn.h"
#include "windowfunctioncolumn.h"

namespace execplan
{
/**
 * Constructors/Destructors
 */
SimpleFilter::SimpleFilter() : fLhs(0), fRhs(0), fIndexFlag(NOINDEX), fJoinFlag(EQUA)
{
}

// TODO: only handled simplecolumn operands for now
SimpleFilter::SimpleFilter(const string& sql) : Filter(sql)
{
  parse(sql);
}

// TODO: only handled simplecolumn operands for now
SimpleFilter::SimpleFilter(const string& sql, ForTestPurposesWithoutColumnsOIDS) : Filter(sql)
{
  parse(sql, ForTestPurposesWithoutColumnsOIDS{});
}

SimpleFilter::SimpleFilter(const SOP& op, ReturnedColumn* lhs, ReturnedColumn* rhs, const long timeZone)
 : fOp(op), fLhs(lhs), fRhs(rhs), fIndexFlag(NOINDEX), fJoinFlag(EQUA), fTimeZone(timeZone)
{
  convertConstant();
}

SimpleFilter::SimpleFilter(const SimpleFilter& rhs)
 : Filter(rhs)
 , fOp(rhs.op())
 , fIndexFlag(rhs.indexFlag())
 , fJoinFlag(rhs.joinFlag())
 , fTimeZone(rhs.timeZone())
{
  fLhs = rhs.lhs()->clone();
  fRhs = rhs.rhs()->clone();

  fSimpleColumnList.clear();
  fAggColumnList.clear();
  fWindowFunctionColumnList.clear();

  SimpleColumn* lsc = dynamic_cast<SimpleColumn*>(fLhs);
  FunctionColumn* lfc = dynamic_cast<FunctionColumn*>(fLhs);
  ArithmeticColumn* lac = dynamic_cast<ArithmeticColumn*>(fLhs);
  WindowFunctionColumn* laf = dynamic_cast<WindowFunctionColumn*>(fLhs);
  AggregateColumn* lagc = dynamic_cast<AggregateColumn*>(fLhs);
  SimpleColumn* rsc = dynamic_cast<SimpleColumn*>(fRhs);
  FunctionColumn* rfc = dynamic_cast<FunctionColumn*>(fRhs);
  ArithmeticColumn* rac = dynamic_cast<ArithmeticColumn*>(fRhs);
  AggregateColumn* ragc = dynamic_cast<AggregateColumn*>(fRhs);
  WindowFunctionColumn* raf = dynamic_cast<WindowFunctionColumn*>(fRhs);

  if (lsc)
  {
    fSimpleColumnList.push_back(lsc);
  }
  else if (lagc)
  {
    fAggColumnList.push_back(lagc);
  }
  else if (lfc)
  {
    fSimpleColumnList.insert(fSimpleColumnList.end(), lfc->simpleColumnList().begin(),
                             lfc->simpleColumnList().end());
    fAggColumnList.insert(fAggColumnList.end(), lfc->aggColumnList().begin(), lfc->aggColumnList().end());
    fWindowFunctionColumnList.insert(fWindowFunctionColumnList.end(), lfc->windowfunctionColumnList().begin(),
                                     lfc->windowfunctionColumnList().end());
  }
  else if (lac)
  {
    fSimpleColumnList.insert(fSimpleColumnList.end(), lac->simpleColumnList().begin(),
                             lac->simpleColumnList().end());
    fAggColumnList.insert(fAggColumnList.end(), lac->aggColumnList().begin(), lac->aggColumnList().end());
    fWindowFunctionColumnList.insert(fWindowFunctionColumnList.end(), lac->windowfunctionColumnList().begin(),
                                     lac->windowfunctionColumnList().end());
  }
  else if (laf)
  {
    fWindowFunctionColumnList.push_back(laf);
  }

  if (rsc)
  {
    fSimpleColumnList.push_back(rsc);
  }
  else if (ragc)
  {
    fAggColumnList.push_back(ragc);
  }
  else if (rfc)
  {
    fSimpleColumnList.insert(fSimpleColumnList.end(), rfc->simpleColumnList().begin(),
                             rfc->simpleColumnList().end());
    fAggColumnList.insert(fAggColumnList.end(), rfc->aggColumnList().begin(), rfc->aggColumnList().end());
    fWindowFunctionColumnList.insert(fWindowFunctionColumnList.end(), rfc->windowfunctionColumnList().begin(),
                                     rfc->windowfunctionColumnList().end());
  }
  else if (rac)
  {
    fSimpleColumnList.insert(fSimpleColumnList.end(), rac->simpleColumnList().begin(),
                             rac->simpleColumnList().end());
    fAggColumnList.insert(fAggColumnList.end(), rac->aggColumnList().begin(), rac->aggColumnList().end());
    fWindowFunctionColumnList.insert(fWindowFunctionColumnList.end(), rac->windowfunctionColumnList().begin(),
                                     rac->windowfunctionColumnList().end());
  }
  else if (raf)
  {
    fWindowFunctionColumnList.push_back(raf);
  }
}

SimpleFilter::~SimpleFilter()
{
  // delete fOp;
  if (fLhs != NULL)
    delete fLhs;

  if (fRhs != NULL)
    delete fRhs;

  fLhs = NULL;
  fRhs = NULL;
}

/**
 * Methods
 */

void SimpleFilter::lhs(ReturnedColumn* lhs)
{
  fLhs = lhs;

  if (fLhs && fRhs)
    convertConstant();
}

void SimpleFilter::rhs(ReturnedColumn* rhs)
{
  fRhs = rhs;

  if (fLhs && fRhs)
    convertConstant();
}

std::string SimpleFilter::escapeString(const std::string& input)
{
  std::ostringstream ss;

  for (std::string::const_iterator iter = input.begin(); iter != input.end(); iter++)
  {
    switch (*iter)
    {
      case '\\': ss << "\\\\"; break;

      case '\'': ss << "\\'"; break;

      default: ss << *iter; break;
    }
  }

  return ss.str();
}

const string SimpleFilter::data() const
{
  string rhs, lhs;

  if (dynamic_cast<ConstantColumn*>(fRhs) &&
      (fRhs->resultType().colDataType == CalpontSystemCatalog::VARCHAR ||
       fRhs->resultType().colDataType == CalpontSystemCatalog::CHAR ||
       fRhs->resultType().colDataType == CalpontSystemCatalog::BLOB ||
       fRhs->resultType().colDataType == CalpontSystemCatalog::TEXT ||
       fRhs->resultType().colDataType == CalpontSystemCatalog::VARBINARY ||
       fRhs->resultType().colDataType == CalpontSystemCatalog::DATE ||
       fRhs->resultType().colDataType == CalpontSystemCatalog::DATETIME ||
       fRhs->resultType().colDataType == CalpontSystemCatalog::TIMESTAMP ||
       fRhs->resultType().colDataType == CalpontSystemCatalog::TIME))
    rhs = "'" + SimpleFilter::escapeString(fRhs->data()) + "'";
  else
    rhs = fRhs->data();

  if (dynamic_cast<ConstantColumn*>(fLhs) &&
      (fLhs->resultType().colDataType == CalpontSystemCatalog::VARCHAR ||
       fLhs->resultType().colDataType == CalpontSystemCatalog::CHAR ||
       fLhs->resultType().colDataType == CalpontSystemCatalog::BLOB ||
       fLhs->resultType().colDataType == CalpontSystemCatalog::TEXT ||
       fLhs->resultType().colDataType == CalpontSystemCatalog::VARBINARY ||
       fLhs->resultType().colDataType == CalpontSystemCatalog::DATE ||
       fLhs->resultType().colDataType == CalpontSystemCatalog::TIME ||
       fLhs->resultType().colDataType == CalpontSystemCatalog::TIMESTAMP ||
       fLhs->resultType().colDataType == CalpontSystemCatalog::DATETIME))
    lhs = "'" + SimpleFilter::escapeString(fLhs->data()) + "'";
  else
    lhs = fLhs->data();

  return lhs + " " + fOp->data() + " " + rhs;
}

const string SimpleFilter::toString() const
{
  ostringstream output;
  output << "SimpleFilter(indexflag=" << fIndexFlag;
  output << " joinFlag= " << fJoinFlag;
  output << " card= " << fCardinality << ")" << endl;
  output << "  " << *fLhs;
  output << "  " << *fOp;
  output << "  " << *fRhs;
  return output.str();
}

string SimpleFilter::toCppCode(IncludeSet& includes) const
{
  includes.insert("simplefilter.h");
  stringstream ss;

  ss << "SimpleFilter(" << std::quoted(data()) << ", SimpleFilter::ForTestPurposesWithoutColumnsOIDS{})";

  return ss.str();
}

void SimpleFilter::parse(string sql, std::optional<ForTestPurposesWithoutColumnsOIDS> testFlag)
{
  fLhs = 0;
  fRhs = 0;
  string delimiter[7] = {">=", "<=", "<>", "!=", "=", "<", ">"};
  string::size_type pos;

  for (int i = 0; i < 7; i++)
  {
    pos = sql.find(delimiter[i], 0);

    if (pos == string::npos)
      continue;

    fOp.reset(new Operator(delimiter[i]));
    string lhs = sql.substr(0, pos);

    if (lhs.at(0) == ' ')
      lhs = lhs.substr(1, pos);

    if (lhs.at(lhs.length() - 1) == ' ')
      lhs = lhs.substr(0, pos - 1);

    if (testFlag)
      fLhs = new SimpleColumn(lhs, SimpleColumn::ForTestPurposeWithoutOID{});
    else
      fLhs = new SimpleColumn(lhs);

    pos = pos + delimiter[i].length();
    string rhs = sql.substr(pos, sql.length());

    if (rhs.at(0) == ' ')
      rhs = rhs.substr(1, rhs.length());

    if (rhs.at(rhs.length() - 1) == ' ')
      rhs = rhs.substr(0, rhs.length() - 1);

    if (testFlag)
      fRhs = new SimpleColumn(rhs, SimpleColumn::ForTestPurposeWithoutOID{});
    else
      fRhs = new SimpleColumn(rhs);
    break;
  }

  if (fLhs == NULL || fRhs == NULL)
    throw runtime_error("invalid sql for simple filter\n");
}

ostream& operator<<(ostream& output, const SimpleFilter& rhs)
{
  output << rhs.toString();
  return output;
}

void SimpleFilter::serialize(messageqcpp::ByteStream& b) const
{
  b << static_cast<ObjectReader::id_t>(ObjectReader::SIMPLEFILTER);
  Filter::serialize(b);

  if (fOp != NULL)
    fOp->serialize(b);
  else
    b << static_cast<ObjectReader::id_t>(ObjectReader::NULL_CLASS);

  if (fLhs != NULL)
    fLhs->serialize(b);
  else
    b << static_cast<ObjectReader::id_t>(ObjectReader::NULL_CLASS);

  if (fRhs != NULL)
    fRhs->serialize(b);
  else
    b << static_cast<ObjectReader::id_t>(ObjectReader::NULL_CLASS);

  b << static_cast<uint32_t>(fIndexFlag);
  b << static_cast<uint32_t>(fJoinFlag);
  messageqcpp::ByteStream::octbyte timeZone = fTimeZone;
  b << timeZone;
}

void SimpleFilter::unserialize(messageqcpp::ByteStream& b)
{
  ObjectReader::checkType(b, ObjectReader::SIMPLEFILTER);

  // delete fOp;
  delete fLhs;
  delete fRhs;
  Filter::unserialize(b);
  fOp.reset(dynamic_cast<Operator*>(ObjectReader::createTreeNode(b)));
  fLhs = dynamic_cast<ReturnedColumn*>(ObjectReader::createTreeNode(b));
  fRhs = dynamic_cast<ReturnedColumn*>(ObjectReader::createTreeNode(b));
  b >> reinterpret_cast<uint32_t&>(fIndexFlag);
  b >> reinterpret_cast<uint32_t&>(fJoinFlag);
  messageqcpp::ByteStream::octbyte timeZone;
  b >> timeZone;
  fTimeZone = timeZone;

  fSimpleColumnList.clear();
  fAggColumnList.clear();
  fWindowFunctionColumnList.clear();

  SimpleColumn* lsc = dynamic_cast<SimpleColumn*>(fLhs);
  FunctionColumn* lfc = dynamic_cast<FunctionColumn*>(fLhs);
  ArithmeticColumn* lac = dynamic_cast<ArithmeticColumn*>(fLhs);
  WindowFunctionColumn* laf = dynamic_cast<WindowFunctionColumn*>(fLhs);
  AggregateColumn* lagc = dynamic_cast<AggregateColumn*>(fLhs);
  SimpleColumn* rsc = dynamic_cast<SimpleColumn*>(fRhs);
  FunctionColumn* rfc = dynamic_cast<FunctionColumn*>(fRhs);
  ArithmeticColumn* rac = dynamic_cast<ArithmeticColumn*>(fRhs);
  AggregateColumn* ragc = dynamic_cast<AggregateColumn*>(fRhs);
  WindowFunctionColumn* raf = dynamic_cast<WindowFunctionColumn*>(fRhs);

  if (lsc)
  {
    fSimpleColumnList.push_back(lsc);
  }
  else if (lagc)
  {
    fAggColumnList.push_back(lagc);
  }
  else if (lfc)
  {
    lfc->setSimpleColumnList();
    fSimpleColumnList.insert(fSimpleColumnList.end(), lfc->simpleColumnList().begin(),
                             lfc->simpleColumnList().end());
    fAggColumnList.insert(fAggColumnList.end(), lfc->aggColumnList().begin(), lfc->aggColumnList().end());
    fWindowFunctionColumnList.insert(fWindowFunctionColumnList.end(), lfc->windowfunctionColumnList().begin(),
                                     lfc->windowfunctionColumnList().end());
  }
  else if (lac)
  {
    lac->setSimpleColumnList();
    fSimpleColumnList.insert(fSimpleColumnList.end(), lac->simpleColumnList().begin(),
                             lac->simpleColumnList().end());
    fAggColumnList.insert(fAggColumnList.end(), lac->aggColumnList().begin(), lac->aggColumnList().end());
    fWindowFunctionColumnList.insert(fWindowFunctionColumnList.end(), lac->windowfunctionColumnList().begin(),
                                     lac->windowfunctionColumnList().end());
  }
  else if (laf)
  {
    fWindowFunctionColumnList.push_back(laf);
  }

  if (rsc)
  {
    fSimpleColumnList.push_back(rsc);
  }
  else if (ragc)
  {
    fAggColumnList.push_back(ragc);
  }
  else if (rfc)
  {
    rfc->setSimpleColumnList();
    fSimpleColumnList.insert(fSimpleColumnList.end(), rfc->simpleColumnList().begin(),
                             rfc->simpleColumnList().end());
    fAggColumnList.insert(fAggColumnList.end(), rfc->aggColumnList().begin(), rfc->aggColumnList().end());
    fWindowFunctionColumnList.insert(fWindowFunctionColumnList.end(), rfc->windowfunctionColumnList().begin(),
                                     rfc->windowfunctionColumnList().end());
  }
  else if (rac)
  {
    rac->setSimpleColumnList();
    fSimpleColumnList.insert(fSimpleColumnList.end(), rac->simpleColumnList().begin(),
                             rac->simpleColumnList().end());
    fAggColumnList.insert(fAggColumnList.end(), rac->aggColumnList().begin(), rac->aggColumnList().end());
    fWindowFunctionColumnList.insert(fWindowFunctionColumnList.end(), rac->windowfunctionColumnList().begin(),
                                     rac->windowfunctionColumnList().end());
  }
  else if (raf)
  {
    fWindowFunctionColumnList.push_back(raf);
  }
}

bool SimpleFilter::operator==(const SimpleFilter& t) const
{
  const Filter *f1, *f2;

  f1 = static_cast<const Filter*>(this);
  f2 = static_cast<const Filter*>(&t);

  if (*f1 != *f2)
    return false;

  if (fOp != NULL)
  {
    if (*fOp != *t.fOp)
      return false;
  }
  else if (t.fOp != NULL)
    return false;

  if (fLhs != NULL)
  {
    if (*fLhs != t.fLhs)
      return false;
  }
  else if (t.fLhs != NULL)
    return false;

  if (fRhs != NULL)
  {
    if (*fRhs != t.fRhs)
      return false;
  }
  else if (t.fRhs != NULL)
    return false;

  else if (fIndexFlag != t.fIndexFlag)
    return false;

  else if (fJoinFlag != t.fJoinFlag)
    return false;

  else if (fTimeZone != t.fTimeZone)
    return false;

  return true;
}

bool SimpleFilter::semanticEq(const SimpleFilter& t) const
{
  if (fOp != NULL)
  {
    if (*fOp != *t.fOp)
      return false;
  }
  if (fLhs != NULL)
  {
    if (*fLhs != t.fLhs && *fLhs != *t.fRhs)
      return false;
  }
  if (fRhs != NULL)
  {
    if (*fRhs != t.fRhs && *fRhs != *t.fLhs)
      return false;
  }

  return true;
}

bool SimpleFilter::operator==(const TreeNode* t) const
{
  const SimpleFilter* o;

  o = dynamic_cast<const SimpleFilter*>(t);

  if (o == NULL)
    return false;

  return *this == *o;
}

bool SimpleFilter::operator!=(const SimpleFilter& t) const
{
  return (!(*this == t));
}

bool SimpleFilter::operator!=(const TreeNode* t) const
{
  return (!(*this == t));
}

bool SimpleFilter::pureFilter()
{
  if (typeid(*fLhs) == typeid(ConstantColumn) && typeid(*fRhs) != typeid(ConstantColumn))
  {
    // make sure constantCol sit on right hand side
    ReturnedColumn* temp = fLhs;
    fLhs = fRhs;
    fRhs = temp;

    // also switch indexFlag
    if (fIndexFlag == SimpleFilter::LEFT)
      fIndexFlag = SimpleFilter::RIGHT;
    else if (fIndexFlag == SimpleFilter::RIGHT)
      fIndexFlag = SimpleFilter::LEFT;

    return true;
  }

  if (typeid(*fRhs) == typeid(ConstantColumn) && typeid(*fLhs) != typeid(ConstantColumn))
    return true;

  return false;
}

void SimpleFilter::convertConstant()
{
  if (fOp->op() == OP_ISNULL || fOp->op() == OP_ISNOTNULL)
    return;

  ConstantColumn* lcc = dynamic_cast<ConstantColumn*>(fLhs);
  ConstantColumn* rcc = dynamic_cast<ConstantColumn*>(fRhs);

  if (lcc)
  {
    Result result = lcc->result();

    if (fRhs->resultType().colDataType == CalpontSystemCatalog::DATE)
    {
      if (lcc->isNull())
      {
        result.intVal = 0;
        result.strVal.dropString();
      }
      else
      {
        result.intVal = dataconvert::DataConvert::dateToInt(result.strVal.safeString(""));
      }
    }
    else if (fRhs->resultType().colDataType == CalpontSystemCatalog::DATETIME)
    {
      if (lcc->isNull())
      {
        result.intVal = 0;
        result.strVal.dropString();
      }
      else
      {
        result.intVal = dataconvert::DataConvert::datetimeToInt(result.strVal.safeString(""));
      }
    }
    else if (fRhs->resultType().colDataType == CalpontSystemCatalog::TIMESTAMP)
    {
      if (lcc->isNull())
      {
        result.intVal = 0;
        result.strVal.dropString();
      }
      else
      {
        result.intVal = dataconvert::DataConvert::timestampToInt(result.strVal.safeString(""), fTimeZone);
      }
    }
    else if (fRhs->resultType().colDataType == CalpontSystemCatalog::TIME)
    {
      if (lcc->isNull())
      {
        result.intVal = 0;
        result.strVal.dropString();
      }
      else
      {
        result.intVal = dataconvert::DataConvert::timeToInt(result.strVal.safeString(""));
      }
    }

    lcc->result(result);
  }

  if (rcc)
  {
    Result result = rcc->result();

    if (fLhs->resultType().colDataType == CalpontSystemCatalog::DATE)
    {
      if (rcc->isNull())
      {
        result.intVal = 0;
        result.strVal.dropString();
      }
      else
      {
        result.intVal = dataconvert::DataConvert::dateToInt(result.strVal.safeString(""));
      }
    }
    else if (fLhs->resultType().colDataType == CalpontSystemCatalog::DATETIME)
    {
      if (rcc->isNull())
      {
        result.intVal = 0;
        result.strVal.dropString();
      }
      else
      {
        result.intVal = dataconvert::DataConvert::datetimeToInt(result.strVal.safeString(""));
      }
    }
    else if (fLhs->resultType().colDataType == CalpontSystemCatalog::TIMESTAMP)
    {
      if (rcc->isNull())
      {
        result.intVal = 0;
        result.strVal.dropString();
      }
      else
      {
        result.intVal = dataconvert::DataConvert::timestampToInt(result.strVal.safeString(""), fTimeZone);
      }
    }
    else if (fLhs->resultType().colDataType == CalpontSystemCatalog::TIME)
    {
      if (rcc->isNull())
      {
        result.intVal = 0;
        result.strVal.dropString();
      }
      else
      {
        result.intVal = dataconvert::DataConvert::timeToInt(result.strVal.safeString());
      }
    }

    rcc->result(result);
  }
}

void SimpleFilter::setDerivedTable()
{
  string lDerivedTable = "";
  string rDerivedTable = "";

  if (hasAggregate())
    return;

  if (fLhs)
  {
    fLhs->setDerivedTable();
    lDerivedTable = fLhs->derivedTable();
  }
  else
  {
    lDerivedTable = "*";
  }

  if (fRhs)
  {
    fRhs->setDerivedTable();
    rDerivedTable = fRhs->derivedTable();
  }
  else
  {
    rDerivedTable = "*";
  }

  if (lDerivedTable == "*")
  {
    fDerivedTable = rDerivedTable;
  }
  else if (rDerivedTable == "*")
  {
    fDerivedTable = lDerivedTable;
  }
  else if (lDerivedTable == rDerivedTable)
  {
    fDerivedTable = lDerivedTable;  // should be the same as rhs
  }
  else
  {
    fDerivedTable = "";
  }
}

void SimpleFilter::replaceRealCol(CalpontSelectExecutionPlan::ReturnedColumnList& derivedColList)
{
  SimpleColumn* sc = NULL;

  if (fLhs)
  {
    sc = dynamic_cast<SimpleColumn*>(fLhs);

    if (sc)
    {
      ReturnedColumn* tmp = derivedColList[sc->colPosition()]->clone();
      delete fLhs;
      fLhs = tmp;
    }
    else
    {
      fLhs->replaceRealCol(derivedColList);
    }
  }

  if (fRhs)
  {
    sc = dynamic_cast<SimpleColumn*>(fRhs);

    if (sc)
    {
      ReturnedColumn* tmp = derivedColList[sc->colPosition()]->clone();
      delete fRhs;
      fRhs = tmp;
    }
    else
    {
      fRhs->replaceRealCol(derivedColList);
    }
  }
}

const std::vector<SimpleColumn*>& SimpleFilter::simpleColumnList()
{
  return fSimpleColumnList;
}

void SimpleFilter::setSimpleColumnList()
{
  SimpleColumn* lsc = dynamic_cast<SimpleColumn*>(fLhs);
  SimpleColumn* rsc = dynamic_cast<SimpleColumn*>(fRhs);
  fSimpleColumnList.clear();

  if (lsc)
  {
    fSimpleColumnList.push_back(lsc);
  }
  else if (fLhs)
  {
    fLhs->setSimpleColumnList();
    fSimpleColumnList.insert(fSimpleColumnList.end(), fLhs->simpleColumnList().begin(),
                             fLhs->simpleColumnList().end());
  }

  if (rsc)
  {
    fSimpleColumnList.push_back(rsc);
  }
  else if (fRhs)
  {
    fRhs->setSimpleColumnList();
    fSimpleColumnList.insert(fSimpleColumnList.end(), fRhs->simpleColumnList().begin(),
                             fRhs->simpleColumnList().end());
  }
}

bool SimpleFilter::hasAggregate()
{
  if (fAggColumnList.empty())
  {
    AggregateColumn* lac = dynamic_cast<AggregateColumn*>(fLhs);
    AggregateColumn* rac = dynamic_cast<AggregateColumn*>(fRhs);
    fAggColumnList.clear();

    if (lac)
    {
      fAggColumnList.insert(fAggColumnList.end(), lac);
    }

    if (rac)
    {
      fAggColumnList.insert(fAggColumnList.end(), rac);
    }

    if (fLhs)
    {
      if (fLhs->hasAggregate())
        fAggColumnList.insert(fAggColumnList.end(), fLhs->aggColumnList().begin(),
                              fLhs->aggColumnList().end());
    }

    if (fRhs)
    {
      if (fRhs->hasAggregate())
        fAggColumnList.insert(fAggColumnList.end(), fRhs->aggColumnList().begin(),
                              fRhs->aggColumnList().end());
    }
  }

  if (!fAggColumnList.empty())
  {
    return true;
  }

  return false;
}

}  // namespace execplan
